make chief sleep longer before exiting

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (92d713a) 98.37% compared to head (4732a66) 98.37%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #983 +/- ## ======================================= Coverage 98.37% 98.37% ======================================= Files 50 50 Lines 3085 3085 ======================================= Hits 3035 3035 Misses 50 50 ```

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